Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1986-05-19
1988-04-12
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
5262922, 5262923, 526293, 526294, 5262929, 526301, 526313, 526316, 5263073, 5263075, 5263076, C08F11416, C08F 2002, C08F11612, C08F11636
Patent
active
047375590
ABSTRACT:
A pressure-sensitive adhesive is provided which is a copolymer of an acrylate monomer which contributes to the visco-elastic properties of the copolymer and a copolymerizable mono-ethylenically unsaturated aromatic ketone comonomer free of ortho-aromatic hydroxyl groups by means of which the copolymer can be crosslinked upon exposure to ultraviolet radiation such that the amount of crosslinking comonomer and the degree of polymerization of the copolymer are controlled to obtain a creep compliance value of at least about 1.2.times.10.sup.-5 cm.sup.2 /dyne, the adhesive exhibits an enhanced level of initial adhesion when applied to skin but resists objectionable adhesion build-up over time. A preferred crosslinking ethylenically unsaturated hydroxyl-free aromatic ketone comonomer is p-acryloxybenzophenone.
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"Radiation Curing of Pressure-Sensitive Adhesives, authored by Toshio Okada, published in the journal (Japanese Languate Publication, vol. 20, No. 611984.
Ser. No. 797,851, filed 11/14/85 by Krampe et al.
Kellen James N.
Taylor Charles W.
Hulse Dale E.
Kulkosky Peter F.
Minnesota Mining and Manufacturing Co.
Schofer Joseph L.
Sell Donald M.
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